Palladium on Carbon: An Efficient, Heterogeneous and Reusable Catalytic System for Carbonylative Synthesis of<i>N</i>-Substituted Phthalimides
作者:Mayur V. Khedkar、Shoeb R. Khan、Dinesh N. Sawant、Dattatraya B. Bagal、Bhalchandra M. Bhanage
DOI:10.1002/adsc.201100460
日期:2011.12
application of palladium on carbon (Pd/C) as a heterogeneous recyclable catalyst was investigated for the double carbonylation of o-dihaloarenes with amines providing excellent yield of N-substituted phthalimides in shorter reaction time as compared to earlier reported homogeneous protocols. Furthermore, the scope of the developed protocol was applied for the synthesis N-substituted phthalimides from o-halobenzoates
Versatile and Sustainable Synthesis of Cyclic Imides from Dicarboxylic Acids and Amines by Nb<sub>2</sub>O<sub>5</sub>as a Base-Tolerant Heterogeneous Lewis Acid Catalyst
作者:Md. Ayub Ali、S. M. A. Hakim Siddiki、Kenichi Kon、Junya Hasegawa、Ken-ichi Shimizu
DOI:10.1002/chem.201404538
日期:2014.10.27
Catalytic condensation of dicarboxylicsacid and amines without excess amount of activating reagents is the most atom‐efficient but unprecedented synthetic method of cyclicimides. Here we present the first general catalytic method, proceeding selectively and efficiently in the presence of a commercial Nb2O5 as a reusable and base‐tolerant heterogeneousLewisacidcatalyst. The method is effective for
二羧酸和胺的催化缩合反应没有过量的活化剂是最高效,最空前的环状酰亚胺合成方法。在这里,我们介绍了第一种通用催化方法,该方法在作为可重用和耐碱多相路易斯酸催化剂的商业Nb 2 O 5的存在下选择性而有效地进行。该方法可有效地从二羧酸或酸酐与胺,羟胺或氨直接合成药学上或工业上重要的环状酰亚胺,例如苯甲酰亚胺,N-羟基邻苯二甲酰亚胺(NHPI)和未取代的环状酰亚胺。
An efficient nano-Cu2O-catalyzed cascade multicomponent reaction of 2-halobenzoic acids and trimethylsilyl cyanide with diverse amines was developed using water as a solvent, affording versatile N-substituted phthalimide derivatives in moderate to excellent yields. This novel strategy features carbon monoxide gas-free, environmentallybenign, one-pot multistep transformation, commercially available
The coordination chemistry of fluorescent pyridinyl– and quinolinyl–phthalimide ligands with the {AuI–PPh3} cationic unit
作者:Lucy A. Mullice、Flora L. Thorp-Greenwood、Rebecca H. Laye、Michael P. Coogan、Benson M. Kariuki、Simon J.A. Pope
DOI:10.1039/b905123f
日期:——
of L11 and L33 the complexes adopt an approximately linear P–Au–N coordination geometry. However, in the case of the sterically demanding L66 the structure shows distortions within the ligand and deviations from a linear coordination geometry. Solution state 1H and 31P1H} NMR confirmed that the proposed formulations and coordination modes exist in solution. At room temperature the photophysical studies
新的单齿 配体, 2-(2-氨基乙基)-N-邻苯二甲酰亚胺吡啶(L 4 4)和8-氨基-N-邻苯二甲酰亚胺基喹啉(L 6 6),使用溶剂免熔法。这些配体连同L 1–3,5 1–3,5(3-氨基-N-邻苯二甲酰亚胺吡啶; 3-氨基甲基-N-邻苯二甲酰亚胺吡啶; 4-氨基甲基-N-邻苯二甲酰亚胺吡啶; 3-氨基-N-邻苯二甲酰亚胺基喹啉)然后用于访问六种通用类型Ph 3 P– Au – L n }(OTf)的发光Au I络合物。X射线晶体学已用于表征三种配合物的结构,表明在L 1 1和L 3 3的情况下,配合物采用近似线性的P–Au–N配位几何。但是,在空间要求L 6 6的情况下,结构会在配体和线性协调几何的偏差。溶液状态1 H和31 P 1 H}核磁共振确认解决方案中存在拟议的公式和协调模式。在室温下,光物理研究表明,六个配合物中的每一个的发射都在可见光区域(395–475 nm)中,并分配给了配体中心荧光(τ
Fragmentation of IsomericN-Quinolinylphthalimides on Electron Impact Ionization
The isomeric 2-, 3-, 5-, 6- and 8-quinolinylphthalimides give rise to different electronimpact ionization massspectra, which permit easy distinction. The specific fragmentation process are rationalized in terms of proximityeffects and stabilization of cyclic ion structures. Collision-induced dissociation spectra were used to support the proposed ion structures of major fragment ions.